<style scoped lang="less">
.login-container {
  padding: 20px;
  margin-top: 80px;
}

.login-container .title h3{
  font-size: 26px;
  font-weight: normal;
}

.login-container .title p{
  line-height: 40px;
  font-size: 14px;
  color: #b8b8b8;
}

.form-item {
  border-bottom: 1px solid #f3f1f2;
  padding: 8px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  .inp {
    display: block;
    border: none;
    outline: none;
    height: 32px;
    font-size: 14px;
    flex: 1;
  }
  img {
    width: 94px;
    height: 31px;
  }
  button {
    height: 31px;
    border: none;
    font-size: 13px;
    color: #cea26a;
    background-color: transparent;
    padding-right: 9px;
  }
}

.login-btn {
  width: 100%;
  height: 42px;
  margin-top: 39px;
  background: linear-gradient(90deg,#ecb53c,#ff9211);
  color: #fff;
  border-radius: 39px;
  box-shadow: 0 10px 20px 0 rgba(0,0,0,.1);
  letter-spacing: 2px;
  display: flex;
  justify-content: center;
  align-items: center;
}
</style>

<template>
  <div class="container">
    <van-nav-bar
      title="登录"
      left-text="返回"
      left-arrow
      @click-left="clickLeft"
    ></van-nav-bar>
    <div class="login-container">
      <div class="title">
        <h3>手机号登录</h3>
        <p>未注册的手机号将自动进行注册</p>
      </div>
      <div class="form">
        <div class="form-item">
          <input v-model="mobile" class="inp" maxlength="11" placeholder="请输入手机号码" type="text">
        </div>
        <div class="form-item">
          <input v-model="picCode" class="inp" maxlength="5" placeholder="请输入图形验证码" type="text">
          <img v-if="picUrl" :src="picUrl" @click="getPicCode" alt="">
        </div>
        <div class="form-item">
          <input class="inp" v-model="msgCode" maxlength="6" placeholder="请输入短信验证码" type="text">
          <button @click="getCode">
            {{ second === totalSecond ? '获取短信验证码' : second+`秒后重新发送` }}
          </button>
        </div>
      </div>
      <div class="login-btn" @click="login">登录</div>
    </div>
  </div>
</template>

<script>
import { codeLogin, getMsgCode, getPicCode } from '@/api/login'
export default {
  name: 'LoginIndex',
  data () {
    return {
      picCode: '',
      picUrl: '',
      picKey: '',
      second: 6,
      totalSecond: 6,
      timer: null,
      mobile: '',
      msgCode: ''
    }
  },
  created () {
    this.getPicCode()
  },
  methods: {
    clickLeft () {
      this.$router.go(-1)
    },
    async getPicCode () {
      const { data: { base64, key } } = await getPicCode()
      this.picUrl = base64
      this.picKey = key
    },
    async getCode () {
      if (!this.validFn()) {
        return
      }
      if (!this.timer && this.second === this.totalSecond) {
        await getMsgCode(this.picCode, this.picKey, this.mobile)
        this.$toast('发送成功，请注意查收')

        // 开启倒计时
        this.timer = setInterval(() => {
          this.second--

          if (this.second < 1) {
            clearInterval(this.timer)
            this.timer = null
            this.second = this.totalSecond
          }
        }, 1000)

        // 发送请求，获取验证码
        this.$toast('发送成功，请注意查收')
      }
    },
    validFn () {
      if (!/^1[3-9]\d{9}$/.test(this.mobile)) {
        this.$toast('请输入正确的手机号')
        return false
      }
      if (!/^\w{4}$/.test(this.picCode)) {
        this.$toast('请输入正确的图形验证码')
        return false
      }
      return true
    },
    async login () {
      if (!this.validFn()) {
        return
      }
      if (!/^\d{6}$/.test(this.msgCode)) {
        this.$toast('请输入正确的手机验证码')
        return
      }
      const res = await codeLogin(this.mobile, this.msgCode)
      this.$store.commit('user/setUserInfo', res.data)
      // 判断有无回跳地址
      const url = this.$route.query.backUrl || '/'
      this.$router.replace(url)
      this.$toast('登录成功')
    }
  },
  destroyed () {
    // 离开页面清除定时器
    clearInterval(this.timer)
  }
}
</script>
